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Subtract Fractions with Different Denominators Worksheet

Fractions lesson 16: Subtracting fractions: different denominators · Set 425 · 40 questions
TalentJR

The method (LCM, then take away): Find the LCM of the two bottom numbers. Change each fraction to that bottom number. Subtract the tops, keep the bottom, and simplify.

NameDateTime takenScore ___ / 40
  1. 1.A bottle has 1/4 litre of juice. Anaya drinks 1/7 litre. How much juice is left (in litres)? =
  2. 2.A tank is 4/5 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  3. 3.9/10 − 3/5 =
  4. 4.Rohan has a ribbon 1/5 m long and cuts off 1/6 m. How long is the ribbon now (in m)? =
  5. 5.1/3 − 2/7 =
  6. 6.A bottle has 7/9 litre of juice. Sara drinks 1/2 litre. How much juice is left (in litres)? =
  7. 7.7/8 − 1/2 =
  8. 8.7/10 − 1/4 =
  9. 9.3/10 − 1/5 =
  10. 10.A tank is 8/9 full of water. Then water filling 1/6 of the tank is used. What fraction of the tank is full now? =
  11. 11.Anaya has a ribbon 1/3 m long and cuts off 2/9 m. How long is the ribbon now (in m)? =
  12. 12.5/6 − 4/5 =
  13. 13.A bottle has 7/8 litre of juice. Aarav drinks 5/6 litre. How much juice is left (in litres)? =
  14. 14.2/3 − 2/5 =
  15. 15.4/5 − 1/4 =
  16. 16.A tank is 8/9 full of water. Then water filling 1/3 of the tank is used. What fraction of the tank is full now? =
  17. 17.A tank is 2/5 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  18. 18.9/10 − 4/5 =
  19. 19.A tank is 9/10 full of water. Then water filling 1/4 of the tank is used. What fraction of the tank is full now? =
  20. 20.A bottle has 3/4 litre of juice. Aarav drinks 1/8 litre. How much juice is left (in litres)? =
  21. 21.A bottle has 7/8 litre of juice. Aarav drinks 1/4 litre. How much juice is left (in litres)? =
  22. 22.1/6 − 1/8 =
  23. 23.5/9 − 1/6 =
  24. 24.5/7 − 2/3 =
  25. 25.5/8 − 1/6 =
  26. 26.3/4 − 2/3 =
  27. 27.1/5 − 1/6 =
  28. 28.A tank is 7/8 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  29. 29.A bottle has 7/10 litre of juice. Diya drinks 1/3 litre. How much juice is left (in litres)? =
  30. 30.7/9 − 1/6 =
  31. 31.5/6 − 5/8 =
  32. 32.5/8 − 1/3 =
  33. 33.1/2 − 1/9 =
  34. 34.A tank is 2/3 full of water. Then water filling 2/9 of the tank is used. What fraction of the tank is full now? =
  35. 35.Kabir has a ribbon 5/6 m long and cuts off 3/10 m. How long is the ribbon now (in m)? =
  36. 36.Ishaan has a ribbon 1/2 m long and cuts off 3/7 m. How long is the ribbon now (in m)? =
  37. 37.A tank is 4/5 full of water. Then water filling 3/4 of the tank is used. What fraction of the tank is full now? =
  38. 38.A bottle has 7/10 litre of juice. Rohan drinks 1/5 litre. How much juice is left (in litres)? =
  39. 39.2/5 − 3/10 =
  40. 40.5/8 − 1/4 =

Answer key

  1. 3/28
  2. 7/15
  3. 3/10
  4. 1/30
  5. 1/21
  6. 5/18
  7. 3/8
  8. 9/20
  9. 1/10
  10. 13/18
  11. 1/9
  12. 1/30
  13. 1/24
  14. 4/15
  15. 11/20
  16. 5/9
  17. 3/20
  18. 1/10
  19. 13/20
  20. 5/8
  21. 5/8
  22. 1/24
  23. 7/18
  24. 1/21
  25. 11/24
  26. 1/12
  27. 1/30
  28. 1/8
  29. 11/30
  30. 11/18
  31. 5/24
  32. 7/24
  33. 7/18
  34. 4/9
  35. 8/15
  36. 1/14
  37. 1/20
  38. 1/2
  39. 1/10
  40. 3/8

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